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1975-76 Models (Retard)

  1. Connect timing light to trailing (lower) spark plug on front rotor housing. Connect jumper wires to primary lead wire terminals. See Fig 1.
  2. Start engine and check retard timing. If timing is incorrect, loosen external adjusting lever set screw. Move lever until correct specification is obtained and tighten set screw.
    Fig 1: 1975-76 Retard Side Timing Check
    G09326481Courtesy of MAZDA MOTORS CORP.
1975 IGNITION TIMING SPECIFICATIONS

Application Timing
Leading TDC
Trailing 15°ATDC
Retard Side
  RX3 & RX4 20°ATDC
1976 IGNITION TIMING SPECIFICATIONS

Application Timing
Leading
  RX3 TDC
All Others 5°ATDC
Trailing 15°ATDC
Retard 20°ATDC